scholarly journals Breakthrough curve moments scaling in hyporheic exchange

2015 ◽  
Vol 51 (2) ◽  
pp. 1353-1358 ◽  
Author(s):  
A. Bellin ◽  
D. Tonina ◽  
A. Marzadri
Keyword(s):  
Breakthrough Curve ◽  
Hyporheic Exchange ◽  
Curve Moments

HYPORHEIC EXCHANGE CONTROLLED BY DYNAMIC STREAM AND HILLSLOPE FLUCTUATIONS

2016 ◽  
Author(s):  
Noah M. Schmadel ◽  
◽  
Adam S. Ward ◽  
Christopher S. Lowry ◽  
Jonathan M. Malzone
Keyword(s):  
Hyporheic Exchange

Effects of riffle–step restoration on hyporheic zone chemistry in N-rich lowland streams

2006 ◽  
Vol 63 (1) ◽  
pp. 120-133 ◽  
Author(s):  
Tamao Kasahara ◽  
Alan R Hill
Keyword(s):  
Urban Areas ◽  
Hyporheic Zone ◽  
Stream Water ◽  
Ion Concentration ◽  
Hyporheic Exchange ◽  
Ecosystem Functions ◽  
Exchange Flow ◽  
Nutrient Inputs ◽  
Lowland Streams ◽  
Hyporheic Zones

Stream restoration projects that aim to rehabilitate ecosystem health have not considered surface–subsurface linkages, although stream water and groundwater interaction has an important role in sustaining stream ecosystem functions. The present study examined the effect of constructed riffles and a step on hyporheic exchange flow and chemistry in restored reaches of several N-rich agricultural and urban streams in southern Ontario. Hydrometric data collected from a network of piezometers and conservative tracer releases indicated that the constructed riffles and steps were effective in inducing hyporheic exchange. However, despite the use of cobbles and boulders in the riffle construction, high stream dissolved oxygen (DO) concentrations were depleted rapidly with depth into the hyporheic zones. Differences between observed and predicted nitrate concentrations based on conservative ion concentration patterns indicated that these hyporheic zones were also nitrate sinks. Zones of low hydraulic conductivity and the occurrence of interstitial fines in the restored cobble-boulder layers suggest that siltation and clogging of the streambed may reduce the downwelling of oxygen- and nitrate-rich stream water. Increases in streambed DO levels and enhancement of habitat for hyporheic fauna that result from riffle–step construction projects may only be temporary in streams that receive increased sediment and nutrient inputs from urban areas and croplands.

Channeling Flow and Solute Transport in a Single Fracture

2013 ◽  
Vol 316-317 ◽  
pp. 632-635
Author(s):  
Ye Fei Tan ◽  
Zhi Fang Zhou ◽  
Shi Qiang Wu ◽  
Xing Hua Xie ◽  
Bo Ning
Keyword(s):  
Finite Element Method ◽  
Drinking Water ◽  
Breakthrough Curve ◽  
Laboratory Experiments ◽  
Fractured Media ◽  
Single Fracture ◽  
The Finite Element Method ◽  
Dispersive Equation ◽  
One Dimensional ◽  
Channeling Flow

Groundwater in fractured media plays an important role in drinking water supply, and the understanding of its principle mechanisms is essential for securing the groundwater exploring and utilization. In this paper, a novel conceptual fracture model was presented on the basis of the reality of channeling flow in natural fractures and laboratory experiments were conducted for the purpose of getting a better understanding of the step-like breakthrough curve (BTC). Experimental results were fitted with convective dispersive equation (CDE) and compared with those of the finite element method (FEM) models. Results showed that the traditional one-dimensional CDE was invalid in the fitting of a step-like BTC and needed to be improved.

Dynamics of Hyporheic Exchange Flux and Fine Particle Deposition Under Moving Bedforms

2021 ◽  
Vol 57 (4) ◽  
Author(s):  
Yoni Teitelbaum ◽  
Jonathan Dallmann ◽  
Colin B. Phillips ◽  
Aaron I. Packman ◽  
Rina Schumer ◽  
...  
Keyword(s):  
Fine Particle ◽  
Particle Deposition ◽  
Hyporheic Exchange ◽  
Exchange Flux

Breakthrough curve modeling of graphene oxide aerogel packed fixed bed column for the removal of Cr(VI) from water

2017 ◽  
Vol 18 ◽  
pp. 150-158 ◽  
Author(s):  
Devendra Kumar Singh ◽  
Vijay Kumar ◽  
Sweta Mohan ◽  
Daraksha Bano ◽  
Syed Hadi Hasan
Keyword(s):  
Graphene Oxide ◽  
Breakthrough Curve ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Curve Modeling ◽  
Graphene Oxide Aerogel

scholarly journals Packed bed column dynamic study for boron removal from geothermal brine by a chelating fiber and breakthrough curve analysis by using mathematical models

Desalination ◽  
2018 ◽  
Vol 437 ◽  
pp. 1-6 ◽  
Author(s):  
Yaşar K. Recepoğlu ◽  
Nalan Kabay ◽  
Idil Yılmaz Ipek ◽  
Müşerref Arda ◽  
Mithat Yüksel ◽  
...  
Keyword(s):  
Mathematical Models ◽  
Breakthrough Curve ◽  
Packed Bed ◽  
Curve Analysis ◽  
Dynamic Study ◽  
Boron Removal ◽  
Packed Bed Column ◽  
Geothermal Brine
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